Its quite the extended question so I appeciate you reading. I want to build my first "custom" rifle. I put custom in quotations because it wont be from the ground up I will be using an old platform. My grandfather had his FFl many years ago and has amassed many surplus rifles. Now my main question is between a Mosin, Chinese SKS, Enfield(multiple styles), sporterized springfield, original types of springfield 1903 rifles and a savage model 110 what would be my best option to swap stock, trigger job..the whole nine yards be? I would like to possible give it the typical scout look baring in mind I would like to keep the whole process less than 500 dollars. Any input would be great on what rifle to choose to begin my custom build. Thank you.